U Cores (9077024002)
Part Number: 9077024002
77 U CORE
Explanation of Part Numbers: Digits 1&2 = product class, 3&4 = material grade.
The U core offers an economical core design with a nearly uniform cross-sectional area. In a power ferrite material they are frequently used in output chokes, power input filters and transformers for switched-mode power supplies and HF fluorescent ballasts.
For any U core requirement not listed in the catalog, please contact our customer service group for availability and pricing.
Weight indicated is per pair or set.
Weight: 20 (g)
|Dim||mm||mm tol||nominal inch||inch misc.|
AL value is measured at 1kHz, < 10 gauss.
These U cores have the same minimum cross-sectional area as the listed effective cross-sectional area.
A MnZn ferrite for use in a wide range of high and low flux density inductive designs for frequencies up to 100 kHz.
Available in 77 material:
77 Material Characteristics
|Initial Permeability @ B < 10 gauss||µi||2000|
|Flux Density @ Field Strength||Gauss
|Residual Flux Density||Gauss||Br||1800|
|Loss Factor @ Frequency||10 -6
|Tan δ/ µi||15
|Temperature Coefficient of Initial Permeability (20 -70°C)||%/°C||1.2|
**** Characteristic curves are measured on standard Toroids (18/10/6 mm) at 25°C and 10 kHz unless otherwise indicated. Impedance characteristics are measured on standard shield beads (3.5/1.3/6.0 mm) unless otherwise indicated.